The silverback gorilla is a special animal. This magnificent male is part of an endangered species. Complete this sheet to learn all about this gentle giant.

Learn more about two kinds of aquatic biomesÃfreshwater and saltwater biomesÃand how you can tell them apart.

Learn about the animal kingdom with this centipede anatomy worksheet. Fun fact: Centipedes have either 15 or 17 pairs of legs, but never 16!

Which tail goes with which animal? Help your preschooler learn to sort and categorize with this fun activity.

This spikey Stegosaurus looks fierce, but don't worry -- he's a vegetarian! Learn all about this massive dinosaur with a fun fact sheet.

Next time you head outside for a hike or a camping trip, bring along this checklist of animal tracks!

Get to know some of the friendly, furry, feathery river wildlife that live near American rivers, then match each one to its home.

The Mockingbird is Tennesse's state bird: it can mimic the sounds of other birds, and even the sounds of insects.

Read about one of Yellowstone National Park's coolest animals, the big horn sheep.

Clock, octopus, starfish, turtle: Which thing does not belong in this group? Kids completing this preschool worksheet identify the object that does not belong.

Discover the symbiotic relationship that helps this angler fish find his next meal!

Get your child thinking about the five senses with this worksheet that gets her to consider taste, touch, sight, smell, and hearing.

Teach your child about an endangered species with this information page, all about the Forest Owlet. They can color as they read some interesting facts.

Colorado's state bird is the Lark Bunting, and you can learn all about it with this coloring page.

Color, cut out, and play with these fun animal finger puppets as your nature lover learns more about prairie dogs, bison, and other animals of the grasslands.

Learn about Red River Hogs in this series of animals facts sheets and coloring pages in one.

Bird-watchers will love this worksheet, featuring just a sample of the many song birds flying around Yellowstone National Park.

Shape up your knowledge of living things with this plant sorting soirÃe! Your kid will build observational skills by describing the attributes of each plant.

Practice your detective skills with this fun worksheet! Have your child go around the house and see how many things from the list they can find.

Open your ears for some interesting science! Your little biologist will learn the basic parts of the ear with this diagram.

This bright and colorful worksheet helps your child bring the technical terms of the bones in his legs down to size.

The narwhal is one unusual animal! Your child will learn about this horned sea creature through text and pictures.

Your future oceanographer will enjoy coloring in the multi-eyed octopus in this coloring page in addition to adding color to the cute angel fish beside him!

Learn about Yellowstone National Park's peregrine falcons, which survived heavy pesticide use in the 1960s.

Try out this simple worksheet diagramming the anatomy of a shrimp. Big words, small sea creature.

Learn about the California tiger salamander, which uses its toxic, bad smell as a defense.

Here's a colorful worksheet for your child to explore one of the five senses, like her sense of taste, through drawing and visuals.

Take a quick lesson in the otters that inhabit Yellowstone National Park and take an even quicker quiz.

Explore the circle of life with this informative coloring sheet! Help your student color and learn the names of each stage of a rhino beetleâs life.